VOICEXML 简介

1. VOICEXML简介 Voice Extensible Markup Language VOICEXML的特点： 是全球的标准，与平台无关 可以在内存中执行，效率很高 为语音门户制定的 可以实现真正意义上的交互

3. VOICEXML的构成： 一个简单的FORM例子：HELLO WORLD <?xml version="1.0"?> <vxml version="2.0"> <form> <block>Hello World!</block> </form> </vxml>

4. MENU例子一 <menu> <prompt> Welcome home. Say one of: <enumerate/> </prompt> <choice next="http://www.sports.example.com/vxml/start.vxml"> Sports </choice> <choice next="http://www.weather.example.com/intro.vxml"> Weather </choice> <choice next="http://www.stargazer.example.com/voice/astronews.vxml"> Stargazer astrophysics news </choice> <noinput>Please say one of <enumerate/></noinput> </menu>

5. MENU例子二 <menu> <property name="inputmodes" value="dtmf"/> <prompt> For sports press 1, For weather press 2, For Stargazer astrophysics press 3. </prompt> <choice dtmf="1" next="http://www.sports.example.com/vxml/start.vxml"/> <choice dtmf="2" next="http://www.weather.example.com/intro.vxml"/> <choice dtmf="3" next="http://www.stargazer.example.com/astronews.vxml"/> </menu>

6. 一个应用可以有多个页面组成 ROOT DOCUMENT LEAF DOCUMENT

7. Application root document (app-root.vxml) <?xml version="1.0"?> <vxml version="2.0"> <var name="bye" expr="'Ciao'"/> <link next="operator_xfer.vxml"> <grammar> <rule id="root" scope="public">operator</rule> </grammar> </link> </vxml>

8. Leaf document (leaf.vxml) <?xml version="1.0"?> <vxml version="2.0" application="app-root.vxml"> <form id="say_goodbye"> <field name="answer" type="boolean"> < prompt >Shall we say <value expr="application.bye"/>?</prompt> <filled> <if cond="answer"> <exit/> </if> <clear namelist="answer"/> </filled> </field> </form> </vxml>

9. FORM内部的元素

10. 一个FIELD的例子 <field name="lo_fat_meal" type="boolean"> <prompt> Do you want a low fat meal on this flight? </prompt> <help> Low fat means less than 10 grams of fat, and under 250 calories </help> <filled> <prompt> I heard <emphasis><value expr="lo_fat_meal"/></emphasis>. </prompt> </filled> </field>

11. 一个OBJECT的例子 <object name="debit" classid="method://credit_card/gather_and_debit" data="http://www.recordings.example.com/prompts/credit/jesse.jar"> <param name="amount" expr="document.amt"/> <param name="vendor" expr="vendor_num"/> </object>

12. 一个RECORD的例子 <record name="greeting" beep="true" maxtime="10s" finalsilence="4000ms" dtmfterm="true" type="audio/wav"> <prompt> At the tone, please say your greeting. </prompt> <noinput> I didn't hear anything, please try again. </noinput> </record>

13. 一个SUBMIT的例子 <submit next="log_request" method="post" namelist="name rank serial_number" fetchtimeout="100s" fetchaudio="audio/brahms2.wav"/>

14. 一个TRANSFER的例子

16. <transfer name="mycall" dest="tel:+358-555-1234567" transferaudio="elevator_music.wav" connecttimeout="60s" bridge="true"> <filled> <assign name="mydur" expr="mycall$.duration"/> <if cond="mycall == 'busy'"> <prompt> Sorry, our customer support team is busy serving other customers. Please try again later. </prompt> <elseif cond="mycall == 'noanswer'"/> <prompt> Sorry, our customer support team's normal hours are 9 am to 7 pm Monday through Saturday. </prompt> </if> </filled> </transfer>

17. FIA Form Interpretation Algorithm <form> <field name = “first” cond = “true”> </field> <field name = “second” cond = “false”> </field> <object name =”third” cond = “true”> <filled> <goto next = …/> </filled> </object> <field name = “forth” expr = “value”> </field> <filled> <clear namelist="first"/> </filled> </form>

18. VOICEXML的不足： 没有呼出的元素 没有会议的元素

19. 谢谢大家